Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Fri Dec 5 07:19:33 2025 Auto Mode Machine = Linux oleg313-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg313-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 4866 12153 542506 500060 64 8 5838 35517 801764 710511 64 16 10100 43304 17433 627470 64 32 12514 73810 1188789 1087638 64 64 15614 103730 1304314 2203800 128 4 9775 12312 656477 595328 128 8 15922 28325 814915 627328 128 16 22261 55698 895074 859260 128 32 18566 62654 942199 889145 128 64 20731 94672 615814 1196221 128 128 13465 92742 1076312 1967960 256 4 6656 21014 345943 524593 256 8 20309 39059 109634 502969 256 16 16728 40328 831194 826078 256 32 12340 81240 1361224 941213 256 64 15655 108989 999940 962301 256 128 41309 136594 1098113 799625 256 256 24265 137556 1649865 2205688 512 4 17259 6256 359002 233477 512 8 25924 26931 717069 745186 512 16 18907 51775 955368 832420 512 32 42578 57237 1062161 803757 512 64 48930 44773 1222379 1038532 512 128 46486 76806 1630828 1510391 512 256 60901 182658 1723770 1537424 512 512 50708 113702 1700565 2256220 1024 4 16889 17301 681329 536414 1024 8 17868 23468 904621 923488 1024 16 19665 15070 1182598 994250 1024 32 22778 57931 1370965 968904 1024 64 66601 113261 1424152 1201790 1024 128 28197 105372 1272279 1297649 1024 256 41970 103548 1530742 1530197 1024 512 54997 124985 1630088 1756054 2048 4 15203 15766 262698 528130 2048 8 17461 24908 746573 783195 2048 16 30586 37245 1052326 897139 2048 32 41459 46238 1092894 989417 2048 64 24882 53116 833181 1062873 2048 128 47665 40919 494561 1265122 2048 256 51234 99004 1314489 1232272 2048 512 50452 56576 1571864 1256425 4096 4 11724 17085 587912 470039 4096 8 20142 20397 693889 280300 4096 16 32372 44030 1160974 717597 4096 32 28187 47189 1232255 1161366 4096 64 59076 78314 1425619 969912 4096 128 39541 124449 1580222 1380041 4096 256 46317 79341 706327 1402231 4096 512 66308 90738 1776283 1217238 8192 4 10041 12912 474976 474432 8192 8 15115 36439 923877 464899 8192 16 35071 44664 617616 939565 8192 32 34365 79982 1191358 813098 8192 64 39102 46526 650163 1061278 8192 128 42710 66410 846636 1069437 8192 256 51688 102498 350821 419282 8192 512 52874 110653 725090 459398 16384 4 13634 13368 298928 423731 16384 8 17448 17888 945366 792952 16384 16 19951 41614 1070350 1050856 16384 32 42206 52090 1191478 1121423 16384 64 47983 57920 561420 1000548 16384 128 46664 70318 745744 923775 16384 256 51345 98763 1116612 1207282 16384 512 68716 100735 1075846 1346469 32768 4 12788 15340 561305 507001 32768 8 23593 31414 858474 778722 32768 16 36544 45733 1118737 863566 32768 32 39566 66704 1189877 612735 32768 64 39594 63477 913805 1092443 32768 128 46430 70065 947104 840811 32768 256 58768 86322 1400583 1296657 32768 512 78460 106417 1317780 1004473 65536 4 13369 12936 400669 260751 65536 8 22460 26791 640144 404084 65536 16 33860 37953 406752 491325 65536 32